Grate and grate-bar.



A. c. BRAZIL.

GRATE AND GRATE BAR.

APPLICATION FILED JAN.29. 1918.

1 ,272,906. Patented 16, 1918.

-3 SHE HEET 1.

A. C. BRAZIL.

GRATE AND GRATE BAR.

APPLICATION FILED mun, ms.

Patented July 16, 1918.

3 SHEETS-SHEET 2 A. C. BRAZIL.

GRATE AND GRATE BAR. APPLICATION mw mmze, i918 I 1,272,906. Patented July 16,1918,

.ments in and relating bars, and it is intended toprovide a grate bars assembled to formpart of a grate.

l the bars of Figs. 1 "shown-on a larger scalethan in said figures.

UNITED STATES Parana orrron.

ANTONIO CARLOS BRAZIL,

0F RIO IDE JANEIROIBRAZIL, ASSIGNOR T0 GOMIFANHIA GRELHASECONOMICAS BRASIL, A. CORPORATION.

GRATE AND GRATE-BAR.

Specification of Letters Patent.

Patented July 16, 1918.

Application filed January 29, 1918. Serial No. 214,384.

To all whom it may concern:

I Be it known thatI, ANTONIO CARLOS BRA- ziL, a citizen of the Republic of the United States of Brazil, residing. at- Rio 'de 'Janeiro, United States of Brazil, have invented .cer-

. tain new and useful Improvements in Grates and Grate-Bars; and I do hereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whiohit appertains to make and use the same.

My invention consists of certain improveto grates and grate which is not apt to clogv up from ashes, cinders, clinkers and other residue, but,

which, if clogged up, maybe readily cleaned rwithoutthe use of slice bars or other tools ordinarily employed ,*a grate bar which has great wearing properfor this purpose. The invention is also intended to provide adapted to the rough usageito which" such bars are necessarily'subjeeted.

.My invention will be more fullyunderties, and which is especially stood after reference. to the accompanying drawings, inwhich similar reference sym- V bols indicate corresponding parts the several views, and in which I Figure lrshows a side: elevation of the grate bar constructed according to my in- I vention.

Fig. 2 is a planview showing a series of Fig.2?) isan end view showing three 0 and 2, theparts being I Fig.4'shows a section along the line 4-4 I of Figs. 1 and 2, theparts being shown on the same scale as in Fig. 3. e

Fig. 5 shows one of the bars mounted 1n the grate of the furnace, with means for shaking the. same, parts being broken away.

Fig. 6 shows an end view of a series of bars mounted to form a grate with the shaking attachment removed.

Fig. 7 is a similar v1ew shows a section along the line to Fig. 6, but 7-7 of Fig.

5, and looking in the direction of the arrows.

Fig. 8 shows a' modified form of grate bar in which the pivot'is near the top of the bar. Fig. 19 shows three. of the bars of 'Fig. 8 as assembled'in'the grate,but as seen from the left 'of said figure.

the bar is curved at the top,

:coal, but with Fig. 10 is a similar view to-Fig. 9, but shows a modifiedform 0f grate bar; and

Fig.711 is a similar view to Fig. 7, but shows an arrangement whereby alternate bars are rocked orvshaken through a limited are and then all of multaneously.

Referring first to'Figs. 1 to 7, A represents a grate bar having its body portion a the bars are shaken siprovided with pivots a adapted to rest in sockets bin the walls B of the grate; and also provided with pins a projecting from the, bosses a which pins are adapted to engage the shaking apparatus, as will be the walls of the grate as shown in Figs. 5

and 6, and the bars are rocked or shaken about these pivots in any suitable way, as

by. means of the plate D, pivoted as at d to the outside bar of the grate andhaving notches d engaging the pins a of the other bars. V

This plate'D, is provided with a rack 0Z f engaging the segmental gear E having teeth 6, which gear is fast on the. shaft F rotated by the hand crank G. The segmental gear E is pivoted eccentrically, as shown in Fig.

7, sothat the teeth 0 may remain in engagement' with the rack 03 on the plate D as said plate is swung from the center in either direction, as indicated in dotted lines in Fig. 7.

I have shown in Figs. 1 to 7 the pivots a of the grate bars located at a short distance below the top of thebar,'but under certain conditions it may be preferable to have these pivots arranged at the top of the bar A as shown in Figs. 8 and 9.

With this construction it will be less diflicult to shake the bar. The bar maybe used with high grades of coal, such as Cardifi coal that has much cinder or gives much clinker I find that lowering the angle than the bars therebetween.

support helps'to move the bottom layer of coal when cleaning the fire.

-Iihavehshown in Figs. 1 to 9 the .top of the grate bar rounded, as at 1, while the -1n-ay be varied at will; but I prefer a full rounded curve of the general character of that shown in Figs. 1 to 9 because such a shape is not so apt to burn out as where the lines are finer.

It will be seen that the tapered head of the bar shown in Figs. 1 to 10 will form wedging faces to engagethe coal, and the bars may be spaced farther apart, or wider air passages may be provided than with the forms of grate now generally used.

Instead of simultaneously shaking all of the bars after the manner indicated in Fig. 7, itmay be more convenient and require less power to shake alternate bars-only, or

to shake alternate bars through a greater Such an arrangement is provided for in the construction shown in Fig. 11, in which the pins a of alternate bars project into bearings in the shaker plate D, while the pins of the other bars project into elongated slots cZ which permit the shaker plates D to have a considerable lateral play in either direction before the pins projecting into these elongated slots d bring. up against the end walls thereof.

With the construction shown a considerable shaking motion may be imparted to alternate grate bars without disturbing the bars located therebetween, while a violent shaking will cause all of the bars to be rocked about their pivots. I

. The shapeof the bars herein described .will enable the bars to be placed farther apart in the grate, providing wide passages therebetween for the influx of air, and the air coming in. slowly at the bottom of the bar gains speed as it passes through the narrow part of the passage between the bars and then spreads out again toward the tops of the bars distributing it through the fuel resting on the bars. This therefore affords a better draft for the air than where, the fuel is located directly above the narrowest part of the air passage.

By having the bars with rounded edges there are no sharp corners to burn, and the bars will last much longer. As the grate may be cleaned by shaking the. grate bars, the necessity for the use of slice bars is avoided.

It will be obvious that various, modifications might be made in the herein. de-

; scribed device, and in the construction, com- 'binatlon and arrangement of parts which could be used without spirit of my inventlon.

departing from the Having thus describedmy invention what I claim and desire to secure by Letters Patent of the United Statesisg I 1 A gratepomprising a plurality of grate bars each having a cross section substantially-in the form of two wedges with larger ends abutting, and the ends] of the wedges rounded, each bar being provided with a pivot lug at each end thereof, with a shaking pin below" said pivot lug, and with a cylindrical spacing lug intermediate of said ends and coaxial'with its pivots, with a shakingplate connected to said pins,

and means for. imparting'a vibratorymO- tion to said plate, substantially asdescribed. 3. A grate comprising a plurality of grate bars each having a cross section substantially in the form of two wedges with their larger ends abutting,'-and the ends of the wedges rounded, each bar being provided with a pivot lug at each end thereof, with a shaking pin below saidpivot lug, and

with a'cylindrical spacing lug intermediate of said ends and coaxial with its pivots, with a shaking plate connected'to said pins, and means for impartinga vibratory mo tion to said late, comprising rack teeth on said plate and a segmental gear wheel engaging said rack teeth, a spindle for said gear wheel secured eccentric thereto, and means for rocking said spindle, substantially as described. I V

4. A grate comprising a plurality'of grate bars each having across section substantially in the form of two wedges with their larger ends abutting, and the ends of the wedges rounded, eachbar'being provided a shaking pin below said pivot lug, and with a cylindrical spacing lug intermediate of said ends and coaxial with its pivots, with a shaking plate connected toalternate pins and provided with slots into which the other pins project, these slots having end walls adapted to bring up against the. correspond with a pivot lug at each end thereof, with ing pins when the plate is vibrated through a sufficient distance, with means. for imparting a vibratory motion to said plate, whereby the groups of'alternate gratebarsare rocked through different angles, substantially as and for the purpose described.

5. A grate bar having a cross'section sub stantially in the form of two wedges with v their larger ends abutting, and the ends of the wedges rounded,-;said bar being pro- 6. A grate bar having a cross section substantially in the form of two wedges with their larger ends abutting and the ends of the wedges rounded, said bar being provided with a pivot lug at each end thereof, and with a shaking pin below said pivot Gopies of this patent may be obtained for, five cents each, by addressing the pin, and with a cylindrical spacing lug located between said pivot lugs and coaxial with said pivot lugs, substantially as and for the purposes described.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

ANTONIO CARLOS BRAZIL.

Witnesses:

ANTONIO L. DOS SANTOS, D. LEUCHT.

Commissioner of Patents,

Washington, D. G." 

